136207440 has 80 divisors (see below), whose sum is σ = 469166400. Its totient is φ = 36321408.

The previous prime is 136207427. The next prime is 136207441. The reversal of 136207440 is 44702631.

136207440 is a `hidden beast` number, since 13 + 6 + 207 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×136207440² = 37104933422707200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136207441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29370 + ... + 33689.

It is an arithmetic number, because the mean of its divisors is an integer number (5864580).

Almost surely, 2^136207440 is an apocalyptic number.

136207440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136207440 is an abundant number, since it is smaller than the sum of its proper divisors (332958960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136207440 is a wasteful number, since it uses less digits than its factorization.

136207440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63081 (or 63069 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 136207440 is about 11670.7943174404. The cubic root of 136207440 is about 514.5176493533.

The spelling of 136207440 in words is "one hundred thirty-six million, two hundred seven thousand, four hundred forty".